ibmvnic: Reset the CRQ queue during driver reset

When a driver reset operation occurs there is not a need to release
the CRQ resources and re-allocate them. Instead a reset of the CRQ
will suffice.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>